.a1{
    margin-left: 60px;
    width: 120px;
    height: 50px;
}
.a2{
    margin-left: 20px;
    width: 120px;
    height: 50px;
}
.a3{
    text-align: right;
    margin-left: 300px;
    width: 70px;
    height: 30px;
}
.a4{
    text-align: right;
    margin-left: 50px;
    width: 70px;
    height: 30px;
}
.left{
    margin-top: 70px;
    margin-left: 80px;
    float: left;
    width: 10%;
}
.center{
    margin-top: 30px;
    margin-left: 50px;
    float: left;
    width: 50%;
}
.right{
    width: 25%;
    margin-top: 50px;
    margin-left: 20px;
    float: left;
}
.b1{
    font-size: 180%;
    margin-left: 10px;
    margin-top: 20px;
}
.b2{
    font-size: 125%;
    margin-top: 40px;
    margin-left: 30px;
}
.b3{
    font-size: 125%;
}
ul li{
    margin-top: 15px;
}
.c1{
    margin-top: 5px;
    width: 90%;
    height: 95%;
}